如何在Ionic2中将复选框输入放入警报提示中？

<ion-item>
  <ion-label>选择项</ion-label>
  <ion-checkbox [(ngModel)]="isChecked"></ion-checkbox>
</ion-item>

import { Component } from '@angular/core';
import { AlertController } from 'ionic-angular';

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {
  isChecked: boolean = false;

  constructor(public alertCtrl: AlertController) {}

  showAlert() {
    let alert = this.alertCtrl.create({
      title: '提示',
      message: '复选框状态：' + this.isChecked,
      buttons: ['确定']
    });
    alert.present();
  }
}

<ion-content padding>
  <button ion-button (click)="showAlert()">显示警报提示</button>
</ion-content>